﻿using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Data;

namespace Doctorwork.Controls
{
	public class StringToVisibleConverter : IValueConverter
	{
		private static StringToVisibleConverter instance;

		public static StringToVisibleConverter Instance
		{
			get { return instance ?? (instance = new StringToVisibleConverter()); }
		}

		public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
		{
			if (value is string)
			{
				if (value == null)
				{
					return Visibility.Collapsed;
				}
				else
				{
					return string.IsNullOrEmpty(value.ToString()) ? Visibility.Collapsed : Visibility.Visible;
				}
			}
			return Visibility.Collapsed;
		}

		public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
		{
			throw new NotImplementedException();
		}
	}
}
